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$456+ Cheap flights from Houston to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/24. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
Mar 26 — Apr 21
Wed 3/26
Wed 4/2
1 adult, Economy
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Cheap flight deals from Houston to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 21, 2025.

Round-trip from

$678
(United Airlines)

One-way from

$456
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$738
From Houston to Porto
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One-way flight from Houston to Porto
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Highest demand for flights based on searches. 5% potential increase in price ($60 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($58 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Houston to Porto

Cheapest flights from Houston to Porto
Explore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 21, 2025.

This United Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/88:00 pmIAH - OPO
2 stops31h 30mUnited Airlines
Sun 8/2412:15 pmOPO - IAH
2 stops33h 20mUnited Airlines
Deal found 3/20$678
This Air Canada deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1110:00 amIAH - OPO
1 stop17h 30mAir Canada
Tue 8/1912:15 pmOPO - IAH
1 stop13h 21mAir Canada
Deal found 3/20$685
This United deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/158:20 pmIAH - OPO
1 stop28h 35mMultiple Airlines
Sun 8/3112:15 pmOPO - IAH
2 stops29h 00mMultiple Airlines
Deal found 3/20$687
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/123:50 pmIAH - OPO
1 stop17h 40mDelta
Wed 8/209:15 pmOPO - IAH
1 stop22h 00mDelta
Deal found 3/20$712
This oojo deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/302:25 pmIAH - OPO
1 stop19h 25mTurkish Airlines
Tue 5/134:50 pmOPO - IAH
1 stop25h 50mTurkish Airlines
Deal found 3/20$768
This British Airways deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/109:40 pmIAH - OPO
1 stop16h 45mBritish Airways
Mon 8/189:15 pmOPO - IAH
1 stop28h 00mBritish Airways
Deal found 3/20$778
This Aeromexico deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/303:50 pmIAH - OPO
1 stop34h 35mAir France
Mon 5/124:20 pmOPO - IAH
1 stop27h 15mAir France
Deal found 3/20$783
This KLM deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/13:50 pmIAH - OPO
1 stop17h 40mKLM
Tue 4/86:50 pmOPO - IAH
1 stop24h 25mKLM
Deal found 3/20$792
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/266:00 amHOU - OPO
2 stops23h 30mDelta
Thu 4/36:30 amOPO - HOU
2 stops21h 57mDelta
Deal found 3/20$805
This American Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/56:31 pmHOU - OPO
2 stops15h 24mAmerican Airlines
Mon 5/1212:20 pmOPO - HOU
2 stops17h 38mAmerican Airlines
Deal found 3/20$815
This Cheapflightsfares deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/303:35 pmIAH - OPO
1 stop18h 10mLufthansa
Mon 5/126:15 amOPO - IAH
2 stops24h 36mLufthansa
Deal found 3/20$891
This American Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/216:32 pmIAH - OPO
2 stops19h 23mAmerican Airlines
Sat 8/3012:20 pmOPO - IAH
2 stops17h 22mAmerican Airlines
Deal found 3/20$905

Cheapflights Fare Finder

Customize your flight search to find flights from Houston to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 21, 2025.
Use the filters below to find and compare flights from Houston to Porto that are best for you.

Fly from

Houston

Fly to

Porto

Route

Depart

Return

Price

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 8/8

8:00 pm-9:30 am

2 stops31h 30m

Porto

Sun 8/24

12:15 pm-3:35 pm

2 stops33h 20m

$678

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Mon 8/11

10:00 am-9:30 am

1 stop17h 30m

Porto

Tue 8/19

12:15 pm-7:36 pm

1 stop13h 21m

$685

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Fri 8/15

8:20 pm-6:55 am

1 stop28h 35m

Porto

Sun 8/31

12:15 pm-11:15 am

2 stops29h 00m

$687

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 8/12

3:50 pm-3:30 pm

1 stop17h 40m

Porto

Wed 8/20

9:15 pm-1:15 pm

1 stop22h 00m

$712

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 4/30

2:25 pm-3:50 pm

1 stop19h 25m

Porto

Tue 5/13

4:50 pm-12:40 pm

1 stop25h 50m

$768

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Sun 8/10

9:40 pm-8:25 pm

1 stop16h 45m

Porto

Mon 8/18

9:15 pm-7:15 pm

1 stop28h 00m

$778

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Wed 4/30

3:50 pm-8:25 am

1 stop34h 35m

Porto

Mon 5/12

4:20 pm-1:35 pm

1 stop27h 15m

$783

HoustonPorto

IAH - OPO

IAHOPO

Houston George Bush Intcntl

Tue 4/1

3:50 pm-3:30 pm

1 stop17h 40m

Porto

Tue 4/8

6:50 pm-1:15 pm

1 stop24h 25m

$792

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Tue 4/1

6:45 pm-10:15 pm

2 stops21h 30m

Porto

Tue 4/8

6:20 am-10:27 pm

2 stops22h 07m

$812

HoustonPorto

HOU - OPO

HOUOPO

Houston Hobby

Mon 5/5

6:31 pm-3:55 pm

2 stops15h 24m

Porto

Mon 5/12

12:20 pm-11:58 pm

2 stops17h 38m

$815

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 17 results
1
2

Best time to book a flight from Houston to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Houston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Houston to Porto

What is the cheapest month to book a flight from Houston to Porto?

Currently, January is the cheapest month in which you can book a flight from Houston to Porto (average of $523). Flying from Houston to Porto in June is currently the most expensive (average of $1,082). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from HOU to OPO?

Find hourly flight availability from Houston to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 21, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 27% on flights from Houston to Porto by exploring options for tickets in the afternoon.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated March 21, 2025.
To help decide which airline to fly from Houston to Porto, see what other customers have to say about Delta, KLM and Air France. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,895 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,895 reviews
Delta
8.0
Very good
7,895 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,319 reviews
Delta
8.0
Very good
7,895 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,422 reviews
Delta
8.0
Very good
7,895 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,605 reviews
Delta
8.0
Very good
7,895 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Turkish Airlines
7.3
Good
3,741 reviews
Delta
8.0
Very good
7,895 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Houston to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Houston?

    If you book a flight to Porto from Houston, you will be flying to Porto, which is the city’s only airport. Porto (OPO) is located 6.8 mi from the center of Porto. There are 0 flights from Houston to Porto per day from 3 different airlines.

  • What are the cheapest airlines flying from Houston to Porto round-trip?

    Flying on United Airlines is currently your cheapest option to Porto, with prices starting at $678. Additional round-trip tickets that might be worth considering are offered by Air Canada and Delta, with the lowest prices starting at $685 and $712, respectively. These flights start at 40% lower than the current average price 3 months from now.

  • Can I find deals for flights from Houston to Porto that include hotel bookings?

    Yes. In addition to deals on Houston to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Houston to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Houston to Porto.

  • Can I find deals for business class flights from Houston to Porto?

    Yes. Cheapflights offers flight deals from Houston to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Houston to Porto?

    Currently, January is the cheapest month in which you can book a flight from Houston to Porto (average of $523). Flying from Houston to Porto in June is currently the most expensive (average of $1,082). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Houston?

Book flights to Houston if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
Arcos de Valdevez

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Top 3 airlines flying from Houston to Porto

Discover the top 3 airlines that operate flights from Houston to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$494Average$1,026FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$635Average$1,039FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$776Average$1,212FlexibilityNo cancel feeOn-time69%
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